Republican state Sen. Justin Eichorn resigned on Thursday following his arrest earlier this week in an underage prostitution sting. Eichorn submitted his letter of resignation, effective Thursday, less than an hour before the Minnesota Senate was set to take an unprecedented vote to expel him from the chamber.

A Republican Minnesota state senator arrested earlier this week after an alleged attempt to solicit sex from a minor faces federal charges.On Wednesday, Sen. Justin Eichorn of Grand Rapids was federally charged with attempted coercion and enticement of a minor.

Justin Eichorn, 40, was arrested by Bloomington Police on Monday after they said they had communication with the state senator. Eichorn gained national headlines earlier this week after he co-authored a bill in the Minnesota Senate wanting to define "Trump derangement syndrome" as a mental illness.